deleting 3.x DataSources

Hi

I am trying to activate the business content for PS DataSources.

We have just completed an upgrade from 3.5 --> 7.0

Before the upgrade we have already activated many business content but we have not started the project yet.

Now I would like to take the advantage of the new DataSources (R3TR RSDS).

I have deleted some 3.x DataSources and replicated from ECC 6.0 but still it brings a 3.x DataSource.

How can I get the new DataSources activated from Business Content in this case?

Appreciate any help.